Synthesis and Properties Exchange Forms of Granulated Binder-free Zeolite X

I N Pavlova,A F Akhmetov,О S Travkina,B I Kutepov,K R Ahmed

doi:10.5923/j.ijme.20120206.02

Abstract

Samples of crystalline aluminosilicate, the granules of which are crystalline aggregates of zeolite X with different degrees of exchange of cations Na+ for cations Ca2+, Mg2+, 脨職+ or 脨聺+ were synthesized. Based on obtained samples, the adsorption of 脨聺2脨聻, 脨隆脨聻2, 脨隆6脨聺6 and n-脨隆7脨聺16 in static and dynamic modes is studied. The dependencies of the amount of adsorbed substance on the type and content of exchangeable cations in zeolite X were found.

Highlights

Granulated zeolites X in different cationic fo rms are used in large-tonnage process of adsorption drying and removal of sulfur compounds and СО2, in gas and liquid environments of various composition
Adsorption cubic capacity and stability when used in cycles of adsorption-desorption of zeolite adsorbents are determined, first of all, by the phase purity and level of crystallin ity of zeolite, contained in them, nature and content of exchangeable cations in the zeolite cavities, as well as the para meters of their porous structure
According to above-mentioned, present research covers the synthesis of Н+, К+, Ca2+ or Mg2+- forms of BF-zeolite X and the adsorption of molecules of Н2О, СО2, С6Н6 и н-С7Н16 by them in static and dynamic modes

Summary

Introduction

Granulated zeolites X in different cationic fo rms are used in large-tonnage process of adsorption drying and removal of sulfur compounds and СО2, in gas and liquid environments of various composition. In[1,2,3,4] described methods for producing binder-free zeolite NaХ (NaХ-BF), granules of wh ich are crystalline aggregates. Such zeo lite granules have higher values of the adsorption characteristics and mechanical strength than the granules with a binder. Information in literature about obtaining other cationic forms are given only for h ighly dispersed and granulated zeolite X with a b inder [6,7] There is no such information for binder-free zeo lite (BF-zeolite). Granules of b inder-free zeolite are crystalline aggregates, so they may have specific features of behavior usual for exchange process. According to above-mentioned, present research covers the synthesis of Н+, К+, Ca2+ or Mg2+- forms of BF-zeolite X and the adsorption of molecules of Н2О, СО2, С6Н6 и н-С7Н16 by them in static and dynamic modes

Experimental Part

Results and Discussion

Conclusions